1 | VERSION = 1
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2 | PATCHLEVEL = 21
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3 | SUBLEVEL = 1
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4 | EXTRAVERSION = -rPBREV
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5 | NAME = Unnamed
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6 |
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7 | # *DOCUMENTATION*
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8 | # To see a list of typical targets execute "make help"
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9 | # More info can be located in ./README
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10 | # Comments in this file are targeted only to the developer, do not
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11 | # expect to learn how to build the kernel reading this file.
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12 |
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13 | # Do not print "Entering directory ..."
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14 | MAKEFLAGS += --no-print-directory
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15 |
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16 | # We are using a recursive build, so we need to do a little thinking
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17 | # to get the ordering right.
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18 | #
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19 | # Most importantly: sub-Makefiles should only ever modify files in
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20 | # their own directory. If in some directory we have a dependency on
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21 | # a file in another dir (which doesn't happen often, but it's often
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22 | # unavoidable when linking the built-in.o targets which finally
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23 | # turn into busybox), we will call a sub make in that other dir, and
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24 | # after that we are sure that everything which is in that other dir
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25 | # is now up to date.
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26 | #
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27 | # The only cases where we need to modify files which have global
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28 | # effects are thus separated out and done before the recursive
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29 | # descending is started. They are now explicitly listed as the
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30 | # prepare rule.
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31 |
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32 | # To put more focus on warnings, be less verbose as default
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33 | # Use 'make V=1' to see the full commands
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34 |
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35 | ifdef V
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36 | ifeq ("$(origin V)", "command line")
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37 | KBUILD_VERBOSE = $(V)
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38 | endif
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39 | endif
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40 | ifndef KBUILD_VERBOSE
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41 | KBUILD_VERBOSE = 0
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42 | endif
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43 |
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44 | # Call sparse as part of compilation of C files
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45 | # Use 'make C=1' to enable sparse checking
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46 |
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47 | ifdef C
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48 | ifeq ("$(origin C)", "command line")
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49 | KBUILD_CHECKSRC = $(C)
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50 | endif
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51 | endif
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52 | ifndef KBUILD_CHECKSRC
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53 | KBUILD_CHECKSRC = 0
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54 | endif
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55 |
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56 | # Use make M=dir to specify directory of external module to build
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57 | # Old syntax make ... SUBDIRS=$PWD is still supported
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58 | # Setting the environment variable KBUILD_EXTMOD take precedence
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59 | ifdef SUBDIRS
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60 | KBUILD_EXTMOD ?= $(SUBDIRS)
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61 | endif
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62 | ifdef M
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63 | ifeq ("$(origin M)", "command line")
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64 | KBUILD_EXTMOD := $(M)
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65 | endif
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66 | endif
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67 |
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68 |
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69 | # kbuild supports saving output files in a separate directory.
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70 | # To locate output files in a separate directory two syntaxes are supported.
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71 | # In both cases the working directory must be the root of the kernel src.
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72 | # 1) O=
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73 | # Use "make O=dir/to/store/output/files/"
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74 | #
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75 | # 2) Set KBUILD_OUTPUT
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76 | # Set the environment variable KBUILD_OUTPUT to point to the directory
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77 | # where the output files shall be placed.
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78 | # export KBUILD_OUTPUT=dir/to/store/output/files/
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79 | # make
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80 | #
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81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment
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82 | # variable.
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83 |
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84 |
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85 | # KBUILD_SRC is set on invocation of make in OBJ directory
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86 | # KBUILD_SRC is not intended to be used by the regular user (for now)
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87 | ifeq ($(KBUILD_SRC),)
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88 |
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89 | # OK, Make called in directory where kernel src resides
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90 | # Do we want to locate output files in a separate directory?
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91 | ifdef O
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92 | ifeq ("$(origin O)", "command line")
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93 | KBUILD_OUTPUT := $(O)
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94 | endif
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95 | endif
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96 |
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97 | # That's our default target when none is given on the command line
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98 | PHONY := _all
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99 | _all:
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100 |
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101 | ifneq ($(KBUILD_OUTPUT),)
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102 | # Invoke a second make in the output directory, passing relevant variables
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103 | # check that the output directory actually exists
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104 | saved-output := $(KBUILD_OUTPUT)
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105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
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106 | $(if $(KBUILD_OUTPUT),, \
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107 | $(error output directory "$(saved-output)" does not exist))
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108 |
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109 | PHONY += $(MAKECMDGOALS)
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110 |
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111 | $(filter-out _all,$(MAKECMDGOALS)) _all:
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112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
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113 | KBUILD_SRC=$(CURDIR) \
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114 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
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115 |
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116 | # Leave processing to above invocation of make
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117 | skip-makefile := 1
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118 | endif # ifneq ($(KBUILD_OUTPUT),)
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119 | endif # ifeq ($(KBUILD_SRC),)
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120 |
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121 | # We process the rest of the Makefile if this is the final invocation of make
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122 | ifeq ($(skip-makefile),)
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123 |
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124 | # If building an external module we do not care about the all: rule
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125 | # but instead _all depend on modules
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126 | PHONY += all
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127 | ifeq ($(KBUILD_EXTMOD),)
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128 | _all: all
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129 | else
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130 | _all: modules
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131 | endif
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132 |
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133 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
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134 | TOPDIR := $(srctree)
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135 | # FIXME - TOPDIR is obsolete, use srctree/objtree
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136 | objtree := $(CURDIR)
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137 | src := $(srctree)
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138 | obj := $(objtree)
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139 |
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140 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
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141 |
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142 | export srctree objtree VPATH TOPDIR
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143 |
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144 |
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145 | # Cross compiling and selecting different set of gcc/bin-utils
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146 | # ---------------------------------------------------------------------------
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147 | #
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148 | # When performing cross compilation for other architectures ARCH shall be set
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149 | # to the target architecture. (See arch/* for the possibilities).
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150 | # ARCH can be set during invocation of make:
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151 | # make ARCH=ia64
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152 | # Another way is to have ARCH set in the environment.
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153 | # The default ARCH is the host where make is executed.
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154 |
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155 | # CROSS_COMPILE specify the prefix used for all executables used
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156 | # during compilation. Only gcc and related bin-utils executables
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157 | # are prefixed with $(CROSS_COMPILE).
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158 | # CROSS_COMPILE can be set on the command line
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159 | # make CROSS_COMPILE=ia64-linux-
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160 | # Alternatively CROSS_COMPILE can be set in the environment.
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161 | # Default value for CROSS_COMPILE is not to prefix executables
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162 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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163 |
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164 | CROSS_COMPILE ?=
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165 | # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
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166 | # and it has not been included yet... thus using an awkward syntax.
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167 | ifeq ($(CROSS_COMPILE),)
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168 | CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
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169 | CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
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170 | CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
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171 | #")
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172 | endif
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173 |
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174 | # SUBARCH tells the usermode build what the underlying arch is. That is set
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175 | # first, and if a usermode build is happening, the "ARCH=um" on the command
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176 | # line overrides the setting of ARCH below. If a native build is happening,
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177 | # then ARCH is assigned, getting whatever value it gets normally, and
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178 | # SUBARCH is subsequently ignored.
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179 |
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180 | ifneq ($(CROSS_COMPILE),)
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181 | SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
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182 | else
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183 | SUBARCH := $(shell uname -m)
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184 | endif
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185 | SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
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186 | -e s/arm.*/arm/ -e s/sa110/arm/ \
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187 | -e s/s390x/s390/ -e s/parisc64/parisc/ \
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188 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
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189 |
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190 | ARCH ?= $(SUBARCH)
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191 |
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192 | # Architecture as present in compile.h
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193 | UTS_MACHINE := $(ARCH)
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194 |
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195 | # SHELL used by kbuild
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196 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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197 | else if [ -x /bin/bash ]; then echo /bin/bash; \
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198 | else echo sh; fi ; fi)
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199 |
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200 | # Decide whether to build built-in, modular, or both.
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201 | # Normally, just do built-in.
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202 |
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203 | KBUILD_MODULES :=
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204 | KBUILD_BUILTIN := 1
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205 |
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206 | # If we have only "make modules", don't compile built-in objects.
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207 | # When we're building modules with modversions, we need to consider
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208 | # the built-in objects during the descend as well, in order to
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209 | # make sure the checksums are uptodate before we record them.
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210 |
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211 | ifeq ($(MAKECMDGOALS),modules)
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212 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
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213 | endif
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214 |
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215 | # If we have "make <whatever> modules", compile modules
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216 | # in addition to whatever we do anyway.
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217 | # Just "make" or "make all" shall build modules as well
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218 |
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219 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
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220 | KBUILD_MODULES := 1
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221 | endif
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222 |
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223 | ifeq ($(MAKECMDGOALS),)
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224 | KBUILD_MODULES := 1
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225 | endif
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226 |
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227 | export KBUILD_MODULES KBUILD_BUILTIN
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228 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
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229 |
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230 | # Beautify output
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231 | # ---------------------------------------------------------------------------
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232 | #
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233 | # Normally, we echo the whole command before executing it. By making
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234 | # that echo $($(quiet)$(cmd)), we now have the possibility to set
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235 | # $(quiet) to choose other forms of output instead, e.g.
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236 | #
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237 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
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238 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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239 | #
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240 | # If $(quiet) is empty, the whole command will be printed.
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241 | # If it is set to "quiet_", only the short version will be printed.
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242 | # If it is set to "silent_", nothing wil be printed at all, since
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243 | # the variable $(silent_cmd_cc_o_c) doesn't exist.
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244 | #
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245 | # A simple variant is to prefix commands with $(Q) - that's useful
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246 | # for commands that shall be hidden in non-verbose mode.
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247 | #
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248 | # $(Q)ln $@ :<
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249 | #
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250 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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251 | # If KBUILD_VERBOSE equals 1 then the above command is displayed.
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252 |
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253 | ifeq ($(KBUILD_VERBOSE),1)
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254 | quiet =
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255 | Q =
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256 | else
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257 | quiet=quiet_
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258 | Q = @
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259 | endif
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260 |
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261 | # If the user is running make -s (silent mode), suppress echoing of
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262 | # commands
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263 |
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264 | ifneq ($(findstring s,$(MAKEFLAGS)),)
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265 | quiet=silent_
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266 | endif
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267 |
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268 | export quiet Q KBUILD_VERBOSE
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269 |
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270 |
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271 | # Look for make include files relative to root of kernel src
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272 | MAKEFLAGS += --include-dir=$(srctree)
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273 |
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274 | HOSTCC = gcc
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275 | HOSTCXX = g++
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276 | HOSTCFLAGS :=
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277 | HOSTCXXFLAGS :=
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278 | # We need some generic definitions
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279 | include $(srctree)/scripts/Kbuild.include
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280 |
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281 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
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282 | HOSTCXXFLAGS += -O2
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283 |
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284 | # For maximum performance (+ possibly random breakage, uncomment
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285 | # the following)
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286 |
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287 | MAKEFLAGS += -rR
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288 |
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289 | # Make variables (CC, etc...)
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290 |
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291 | AS = $(CROSS_COMPILE)as
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292 | CC = $(CROSS_COMPILE)gcc
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293 | LD = $(CC) -nostdlib
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294 | CPP = $(CC) -E
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295 | AR = $(CROSS_COMPILE)ar
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296 | NM = $(CROSS_COMPILE)nm
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297 | STRIP = $(CROSS_COMPILE)strip
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298 | OBJCOPY = $(CROSS_COMPILE)objcopy
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299 | OBJDUMP = $(CROSS_COMPILE)objdump
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300 | PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
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301 | AWK = awk
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302 | GENKSYMS = scripts/genksyms/genksyms
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303 | DEPMOD = /sbin/depmod
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304 | KALLSYMS = scripts/kallsyms
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305 | PERL = perl
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306 | CHECK = sparse
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307 |
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308 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
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309 | MODFLAGS = -DMODULE
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310 | CFLAGS_MODULE = $(MODFLAGS)
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311 | AFLAGS_MODULE = $(MODFLAGS)
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312 | LDFLAGS_MODULE = -r
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313 | CFLAGS_KERNEL =
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314 | AFLAGS_KERNEL =
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315 |
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316 |
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317 | # Use LINUXINCLUDE when you must reference the include/ directory.
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318 | # Needed to be compatible with the O= option
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319 | CFLAGS := $(CFLAGS)
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320 | # Added only to final link stage of busybox binary
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321 | CFLAGS_busybox := $(CFLAGS_busybox)
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322 | CPPFLAGS := $(CPPFLAGS)
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323 | AFLAGS := $(AFLAGS)
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324 | LDFLAGS := $(LDFLAGS)
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325 | LDLIBS :=
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326 |
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327 | # Read KERNELRELEASE from .kernelrelease (if it exists)
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328 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
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329 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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330 |
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331 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
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332 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
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333 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
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334 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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335 |
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336 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
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337 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
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338 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
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339 | export FLTFLAGS
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340 |
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341 | # When compiling out-of-tree modules, put MODVERDIR in the module
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342 | # tree rather than in the kernel tree. The kernel tree might
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343 | # even be read-only.
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344 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
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345 |
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346 | # Files to ignore in find ... statements
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347 |
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348 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
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349 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
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350 |
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351 | # ===========================================================================
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352 | # Rules shared between *config targets and build targets
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353 |
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354 | # Basic helpers built in scripts/
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355 | PHONY += scripts_basic
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356 | scripts_basic:
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357 | $(Q)$(MAKE) $(build)=scripts/basic
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358 |
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359 | # To avoid any implicit rule to kick in, define an empty command.
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360 | scripts/basic/%: scripts_basic ;
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361 |
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362 | # This target generates Kbuild's and Config.in's from *.c files
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363 | PHONY += gen_build_files
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364 | gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
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365 | $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
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366 |
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367 | # bbox: we have helpers in applets/
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368 | # we depend on scripts_basic, since scripts/basic/fixdep
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369 | # must be built before any other host prog
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370 | PHONY += applets_dir
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371 | applets_dir: scripts_basic gen_build_files
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372 | $(Q)$(MAKE) $(build)=applets
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373 |
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374 | applets/%: applets_dir ;
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375 |
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376 | PHONY += outputmakefile
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377 | # outputmakefile generates a Makefile in the output directory, if using a
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378 | # separate output directory. This allows convenient use of make in the
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379 | # output directory.
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380 | outputmakefile:
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381 | ifneq ($(KBUILD_SRC),)
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382 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
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383 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
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384 | endif
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385 |
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386 | # To make sure we do not include .config for any of the *config targets
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387 | # catch them early, and hand them over to scripts/kconfig/Makefile
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388 | # It is allowed to specify more targets when calling make, including
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389 | # mixing *config targets and build targets.
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390 | # For example 'make oldconfig all'.
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391 | # Detect when mixed targets is specified, and make a second invocation
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392 | # of make so .config is not included in this case either (for *config).
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393 |
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394 | no-dot-config-targets := clean mrproper distclean \
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395 | cscope TAGS tags help %docs
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396 | #bbox# check% is removed from above
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397 |
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398 | config-targets := 0
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399 | mixed-targets := 0
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400 | dot-config := 1
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401 |
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402 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
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403 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
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404 | dot-config := 0
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405 | endif
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---|
406 | endif
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407 |
|
---|
408 | ifeq ($(KBUILD_EXTMOD),)
|
---|
409 | ifneq ($(filter config %config,$(MAKECMDGOALS)),)
|
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410 | config-targets := 1
|
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411 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
|
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412 | mixed-targets := 1
|
---|
413 | endif
|
---|
414 | endif
|
---|
415 | endif
|
---|
416 |
|
---|
417 | ifeq ($(mixed-targets),1)
|
---|
418 | # ===========================================================================
|
---|
419 | # We're called with mixed targets (*config and build targets).
|
---|
420 | # Handle them one by one.
|
---|
421 |
|
---|
422 | %:: FORCE
|
---|
423 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
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---|
424 |
|
---|
425 | else
|
---|
426 | ifeq ($(config-targets),1)
|
---|
427 | # ===========================================================================
|
---|
428 | # *config targets only - make sure prerequisites are updated, and descend
|
---|
429 | # in scripts/kconfig to make the *config target
|
---|
430 |
|
---|
431 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
|
---|
432 | # KBUILD_DEFCONFIG may point out an alternative default configuration
|
---|
433 | # used for 'make defconfig'
|
---|
434 | -include $(srctree)/arch/$(ARCH)/Makefile
|
---|
435 | export KBUILD_DEFCONFIG
|
---|
436 |
|
---|
437 | config: scripts_basic outputmakefile gen_build_files FORCE
|
---|
438 | $(Q)mkdir -p include
|
---|
439 | $(Q)$(MAKE) $(build)=scripts/kconfig $@
|
---|
440 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
|
---|
441 |
|
---|
442 | %config: scripts_basic outputmakefile gen_build_files FORCE
|
---|
443 | $(Q)mkdir -p include
|
---|
444 | $(Q)$(MAKE) $(build)=scripts/kconfig $@
|
---|
445 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
|
---|
446 |
|
---|
447 | else
|
---|
448 | # ===========================================================================
|
---|
449 | # Build targets only - this includes busybox, arch specific targets, clean
|
---|
450 | # targets and others. In general all targets except *config targets.
|
---|
451 |
|
---|
452 | ifeq ($(KBUILD_EXTMOD),)
|
---|
453 | # Additional helpers built in scripts/
|
---|
454 | # Carefully list dependencies so we do not try to build scripts twice
|
---|
455 | # in parallel
|
---|
456 | PHONY += scripts
|
---|
457 | scripts: gen_build_files scripts_basic include/config/MARKER
|
---|
458 | $(Q)$(MAKE) $(build)=$(@)
|
---|
459 |
|
---|
460 | scripts_basic: include/autoconf.h
|
---|
461 |
|
---|
462 | # Objects we will link into busybox / subdirs we need to visit
|
---|
463 | core-y := \
|
---|
464 | applets/ \
|
---|
465 |
|
---|
466 | libs-y := \
|
---|
467 | archival/ \
|
---|
468 | archival/libarchive/ \
|
---|
469 | console-tools/ \
|
---|
470 | coreutils/ \
|
---|
471 | coreutils/libcoreutils/ \
|
---|
472 | debianutils/ \
|
---|
473 | e2fsprogs/ \
|
---|
474 | editors/ \
|
---|
475 | findutils/ \
|
---|
476 | init/ \
|
---|
477 | libbb/ \
|
---|
478 | libpwdgrp/ \
|
---|
479 | loginutils/ \
|
---|
480 | mailutils/ \
|
---|
481 | miscutils/ \
|
---|
482 | modutils/ \
|
---|
483 | networking/ \
|
---|
484 | networking/libiproute/ \
|
---|
485 | networking/udhcp/ \
|
---|
486 | printutils/ \
|
---|
487 | procps/ \
|
---|
488 | runit/ \
|
---|
489 | selinux/ \
|
---|
490 | shell/ \
|
---|
491 | sysklogd/ \
|
---|
492 | util-linux/ \
|
---|
493 | util-linux/volume_id/ \
|
---|
494 |
|
---|
495 | endif # KBUILD_EXTMOD
|
---|
496 |
|
---|
497 | ifeq ($(dot-config),1)
|
---|
498 | # In this section, we need .config
|
---|
499 |
|
---|
500 | # Read in dependencies to all Kconfig* files, make sure to run
|
---|
501 | # oldconfig if changes are detected.
|
---|
502 | -include .kconfig.d
|
---|
503 |
|
---|
504 | -include .config
|
---|
505 |
|
---|
506 | # If .config needs to be updated, it will be done via the dependency
|
---|
507 | # that autoconf has on .config.
|
---|
508 | # To avoid any implicit rule to kick in, define an empty command
|
---|
509 | .config .kconfig.d: ;
|
---|
510 |
|
---|
511 | # Now we can define CFLAGS etc according to .config
|
---|
512 | include $(srctree)/Makefile.flags
|
---|
513 |
|
---|
514 | # If .config is newer than include/autoconf.h, someone tinkered
|
---|
515 | # with it and forgot to run make oldconfig.
|
---|
516 | # If kconfig.d is missing then we are probarly in a cleaned tree so
|
---|
517 | # we execute the config step to be sure to catch updated Kconfig files
|
---|
518 | include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
|
---|
519 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
|
---|
520 |
|
---|
521 | include/usage.h: gen_build_files
|
---|
522 |
|
---|
523 | else
|
---|
524 | # Dummy target needed, because used as prerequisite
|
---|
525 | include/autoconf.h: ;
|
---|
526 | endif
|
---|
527 |
|
---|
528 | # The all: target is the default when no target is given on the
|
---|
529 | # command line.
|
---|
530 | # This allow a user to issue only 'make' to build a kernel including modules
|
---|
531 | # Defaults busybox but it is usually overridden in the arch makefile
|
---|
532 | all: busybox doc
|
---|
533 |
|
---|
534 | -include $(srctree)/arch/$(ARCH)/Makefile
|
---|
535 |
|
---|
536 | # arch Makefile may override CC so keep this after arch Makefile is included
|
---|
537 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
|
---|
538 | CHECKFLAGS += $(NOSTDINC_FLAGS)
|
---|
539 |
|
---|
540 | # Default kernel image to build when no specific target is given.
|
---|
541 | # KBUILD_IMAGE may be overruled on the commandline or
|
---|
542 | # set in the environment
|
---|
543 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over
|
---|
544 | # this default value
|
---|
545 | export KBUILD_IMAGE ?= busybox
|
---|
546 |
|
---|
547 | #
|
---|
548 | # INSTALL_PATH specifies where to place the updated kernel and system map
|
---|
549 | # images. Default is /boot, but you can set it to other values
|
---|
550 | export INSTALL_PATH ?= /boot
|
---|
551 |
|
---|
552 | #
|
---|
553 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
|
---|
554 | # relocations required by build roots. This is not defined in the
|
---|
555 | # makefile but the arguement can be passed to make if needed.
|
---|
556 | #
|
---|
557 |
|
---|
558 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
---|
559 | export MODLIB
|
---|
560 |
|
---|
561 |
|
---|
562 | ifeq ($(KBUILD_EXTMOD),)
|
---|
563 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
|
---|
564 |
|
---|
565 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
|
---|
566 | $(core-n) $(core-) $(libs-n) $(libs-) \
|
---|
567 | )))
|
---|
568 |
|
---|
569 | core-y := $(patsubst %/, %/built-in.o, $(core-y))
|
---|
570 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
|
---|
571 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
|
---|
572 | libs-y := $(libs-y1) $(libs-y2)
|
---|
573 |
|
---|
574 | # Build busybox
|
---|
575 | # ---------------------------------------------------------------------------
|
---|
576 | # busybox is build from the objects selected by $(busybox-init) and
|
---|
577 | # $(busybox-main). Most are built-in.o files from top-level directories
|
---|
578 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
|
---|
579 | # Ordering when linking is important, and $(busybox-init) must be first.
|
---|
580 | #
|
---|
581 | # busybox
|
---|
582 | # ^
|
---|
583 | # |
|
---|
584 | # +-< $(busybox-init)
|
---|
585 | # | +--< init/version.o + more
|
---|
586 | # |
|
---|
587 | # +--< $(busybox-main)
|
---|
588 | # | +--< driver/built-in.o mm/built-in.o + more
|
---|
589 | # |
|
---|
590 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
|
---|
591 | #
|
---|
592 | # busybox version (uname -v) cannot be updated during normal
|
---|
593 | # descending-into-subdirs phase since we do not yet know if we need to
|
---|
594 | # update busybox.
|
---|
595 | # Therefore this step is delayed until just before final link of busybox -
|
---|
596 | # except in the kallsyms case where it is done just before adding the
|
---|
597 | # symbols to the kernel.
|
---|
598 | #
|
---|
599 | # System.map is generated to document addresses of all kernel symbols
|
---|
600 |
|
---|
601 | busybox-all := $(core-y) $(libs-y)
|
---|
602 |
|
---|
603 | # Rule to link busybox - also used during CONFIG_KALLSYMS
|
---|
604 | # May be overridden by arch/$(ARCH)/Makefile
|
---|
605 | quiet_cmd_busybox__ ?= LINK $@
|
---|
606 | cmd_busybox__ ?= $(srctree)/scripts/trylink \
|
---|
607 | "$@" \
|
---|
608 | "$(CC)" \
|
---|
609 | "$(CFLAGS) $(CFLAGS_busybox)" \
|
---|
610 | "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
|
---|
611 | "$(core-y)" \
|
---|
612 | "$(libs-y)" \
|
---|
613 | "$(LDLIBS)"
|
---|
614 |
|
---|
615 | # Generate System.map
|
---|
616 | quiet_cmd_sysmap = SYSMAP
|
---|
617 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
|
---|
618 |
|
---|
619 | # Link of busybox
|
---|
620 | # If CONFIG_KALLSYMS is set .version is already updated
|
---|
621 | # Generate System.map and verify that the content is consistent
|
---|
622 | # Use + in front of the busybox_version rule to silent warning with make -j2
|
---|
623 | # First command is ':' to allow us to use + in front of the rule
|
---|
624 | define rule_busybox__
|
---|
625 | :
|
---|
626 | $(call cmd,busybox__)
|
---|
627 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
|
---|
628 | endef
|
---|
629 |
|
---|
630 |
|
---|
631 | ifdef CONFIG_KALLSYMS
|
---|
632 | # Generate section listing all symbols and add it into busybox $(kallsyms.o)
|
---|
633 | # It's a three stage process:
|
---|
634 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
|
---|
635 | # empty
|
---|
636 | # Running kallsyms on that gives us .tmp_kallsyms1.o with
|
---|
637 | # the right size - busybox version (uname -v) is updated during this step
|
---|
638 | # o .tmp_busybox2 now has a __kallsyms section of the right size,
|
---|
639 | # but due to the added section, some addresses have shifted.
|
---|
640 | # From here, we generate a correct .tmp_kallsyms2.o
|
---|
641 | # o The correct .tmp_kallsyms2.o is linked into the final busybox.
|
---|
642 | # o Verify that the System.map from busybox matches the map from
|
---|
643 | # .tmp_busybox2, just in case we did not generate kallsyms correctly.
|
---|
644 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
|
---|
645 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
|
---|
646 | # temporary bypass to allow the kernel to be built while the
|
---|
647 | # maintainers work out what went wrong with kallsyms.
|
---|
648 |
|
---|
649 | ifdef CONFIG_KALLSYMS_EXTRA_PASS
|
---|
650 | last_kallsyms := 3
|
---|
651 | else
|
---|
652 | last_kallsyms := 2
|
---|
653 | endif
|
---|
654 |
|
---|
655 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
|
---|
656 |
|
---|
657 | define verify_kallsyms
|
---|
658 | $(Q)$(if $($(quiet)cmd_sysmap), \
|
---|
659 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
|
---|
660 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
|
---|
661 | $(Q)cmp -s System.map .tmp_System.map || \
|
---|
662 | (echo Inconsistent kallsyms data; \
|
---|
663 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
|
---|
664 | rm .tmp_kallsyms* ; /bin/false )
|
---|
665 | endef
|
---|
666 |
|
---|
667 | # Update busybox version before link
|
---|
668 | # Use + in front of this rule to silent warning about make -j1
|
---|
669 | # First command is ':' to allow us to use + in front of this rule
|
---|
670 | cmd_ksym_ld = $(cmd_busybox__)
|
---|
671 | define rule_ksym_ld
|
---|
672 | :
|
---|
673 | +$(call cmd,busybox_version)
|
---|
674 | $(call cmd,busybox__)
|
---|
675 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
|
---|
676 | endef
|
---|
677 |
|
---|
678 | # Generate .S file with all kernel symbols
|
---|
679 | quiet_cmd_kallsyms = KSYM $@
|
---|
680 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
|
---|
681 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
|
---|
682 |
|
---|
683 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
|
---|
684 | $(call if_changed_dep,as_o_S)
|
---|
685 |
|
---|
686 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
|
---|
687 | $(call cmd,kallsyms)
|
---|
688 |
|
---|
689 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version
|
---|
690 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
|
---|
691 | $(call if_changed_rule,ksym_ld)
|
---|
692 |
|
---|
693 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
|
---|
694 | $(call if_changed,busybox__)
|
---|
695 |
|
---|
696 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
|
---|
697 | $(call if_changed,busybox__)
|
---|
698 |
|
---|
699 | # Needs to visit scripts/ before $(KALLSYMS) can be used.
|
---|
700 | $(KALLSYMS): scripts ;
|
---|
701 |
|
---|
702 | # Generate some data for debugging strange kallsyms problems
|
---|
703 | debug_kallsyms: .tmp_map$(last_kallsyms)
|
---|
704 |
|
---|
705 | .tmp_map%: .tmp_busybox% FORCE
|
---|
706 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
|
---|
707 |
|
---|
708 | .tmp_map3: .tmp_map2
|
---|
709 |
|
---|
710 | .tmp_map2: .tmp_map1
|
---|
711 |
|
---|
712 | endif # ifdef CONFIG_KALLSYMS
|
---|
713 |
|
---|
714 | # busybox image - including updated kernel symbols
|
---|
715 | busybox_unstripped: $(busybox-all) FORCE
|
---|
716 | $(call if_changed_rule,busybox__)
|
---|
717 | $(Q)rm -f .old_version
|
---|
718 |
|
---|
719 | busybox: busybox_unstripped
|
---|
720 | ifeq ($(SKIP_STRIP),y)
|
---|
721 | $(Q)cp $< $@
|
---|
722 | else
|
---|
723 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
|
---|
724 | busybox_unstripped -o $@
|
---|
725 | # strip is confused by PIE executable and does not set exec bits
|
---|
726 | $(Q)chmod a+x $@
|
---|
727 | endif
|
---|
728 |
|
---|
729 | # The actual objects are generated when descending,
|
---|
730 | # make sure no implicit rule kicks in
|
---|
731 | $(sort $(busybox-all)): $(busybox-dirs) ;
|
---|
732 |
|
---|
733 | # Handle descending into subdirectories listed in $(busybox-dirs)
|
---|
734 | # Preset locale variables to speed up the build process. Limit locale
|
---|
735 | # tweaks to this spot to avoid wrong language settings when running
|
---|
736 | # make menuconfig etc.
|
---|
737 | # Error messages still appears in the original language
|
---|
738 |
|
---|
739 | PHONY += $(busybox-dirs)
|
---|
740 | $(busybox-dirs): prepare scripts
|
---|
741 | $(Q)$(MAKE) $(build)=$@
|
---|
742 |
|
---|
743 | # Build the kernel release string
|
---|
744 | # The KERNELRELEASE is stored in a file named .kernelrelease
|
---|
745 | # to be used when executing for example make install or make modules_install
|
---|
746 | #
|
---|
747 | # Take the contents of any files called localversion* and the config
|
---|
748 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
|
---|
749 | # LOCALVERSION from the command line override all of this
|
---|
750 |
|
---|
751 | nullstring :=
|
---|
752 | space := $(nullstring) # end of line
|
---|
753 |
|
---|
754 | ___localver = $(objtree)/localversion* $(srctree)/localversion*
|
---|
755 | __localver = $(sort $(wildcard $(___localver)))
|
---|
756 | # skip backup files (containing '~')
|
---|
757 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
|
---|
758 |
|
---|
759 | localver = $(subst $(space),, \
|
---|
760 | $(shell cat /dev/null $(_localver)) \
|
---|
761 | $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
|
---|
762 |
|
---|
763 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
|
---|
764 | # and if the SCM is know a tag from the SCM is appended.
|
---|
765 | # The appended tag is determinded by the SCM used.
|
---|
766 | #
|
---|
767 | # Currently, only git is supported.
|
---|
768 | # Other SCMs can edit scripts/setlocalversion and add the appropriate
|
---|
769 | # checks as needed.
|
---|
770 | ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
|
---|
771 | _localver-auto = $(shell $(CONFIG_SHELL) \
|
---|
772 | $(srctree)/scripts/setlocalversion $(srctree))
|
---|
773 | localver-auto = $(LOCALVERSION)$(_localver-auto)
|
---|
774 | endif
|
---|
775 |
|
---|
776 | localver-full = $(localver)$(localver-auto)
|
---|
777 |
|
---|
778 | # Store (new) KERNELRELASE string in .kernelrelease
|
---|
779 | kernelrelease = $(KERNELVERSION)$(localver-full)
|
---|
780 | .kernelrelease: FORCE
|
---|
781 | $(Q)rm -f $@
|
---|
782 | $(Q)echo $(kernelrelease) > $@
|
---|
783 |
|
---|
784 |
|
---|
785 | # Things we need to do before we recursively start building the kernel
|
---|
786 | # or the modules are listed in "prepare".
|
---|
787 | # A multi level approach is used. prepareN is processed before prepareN-1.
|
---|
788 | # archprepare is used in arch Makefiles and when processed asm symlink,
|
---|
789 | # version.h and scripts_basic is processed / created.
|
---|
790 |
|
---|
791 | # Listed in dependency order
|
---|
792 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
|
---|
793 |
|
---|
794 | # prepare-all is deprecated, use prepare as valid replacement
|
---|
795 | PHONY += prepare-all
|
---|
796 |
|
---|
797 | # prepare3 is used to check if we are building in a separate output directory,
|
---|
798 | # and if so do:
|
---|
799 | # 1) Check that make has not been executed in the kernel src $(srctree)
|
---|
800 | # 2) Create the include2 directory, used for the second asm symlink
|
---|
801 | prepare3: .kernelrelease
|
---|
802 | ifneq ($(KBUILD_SRC),)
|
---|
803 | @echo ' Using $(srctree) as source for busybox'
|
---|
804 | $(Q)if [ -f $(srctree)/.config ]; then \
|
---|
805 | echo " $(srctree) is not clean, please run 'make mrproper'";\
|
---|
806 | echo " in the '$(srctree)' directory.";\
|
---|
807 | /bin/false; \
|
---|
808 | fi;
|
---|
809 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
|
---|
810 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
|
---|
811 | endif
|
---|
812 |
|
---|
813 | # prepare2 creates a makefile if using a separate output directory
|
---|
814 | prepare2: prepare3 outputmakefile
|
---|
815 |
|
---|
816 | prepare1: prepare2 include/config/MARKER
|
---|
817 | ifneq ($(KBUILD_MODULES),)
|
---|
818 | $(Q)mkdir -p $(MODVERDIR)
|
---|
819 | $(Q)rm -f $(MODVERDIR)/*
|
---|
820 | endif
|
---|
821 |
|
---|
822 | archprepare: prepare1 scripts_basic applets_dir
|
---|
823 |
|
---|
824 | prepare0: archprepare FORCE
|
---|
825 | $(Q)$(MAKE) $(build)=.
|
---|
826 |
|
---|
827 | # All the preparing..
|
---|
828 | prepare prepare-all: prepare0
|
---|
829 |
|
---|
830 | # Leave this as default for preprocessing busybox.lds.S, which is now
|
---|
831 | # done in arch/$(ARCH)/kernel/Makefile
|
---|
832 |
|
---|
833 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
|
---|
834 |
|
---|
835 | # FIXME: The asm symlink changes when $(ARCH) changes. That's
|
---|
836 | # hard to detect, but I suppose "make mrproper" is a good idea
|
---|
837 | # before switching between archs anyway.
|
---|
838 |
|
---|
839 | #bbox# include/asm:
|
---|
840 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
|
---|
841 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi;
|
---|
842 | #bbox# @ln -fsn asm-$(ARCH) $@
|
---|
843 |
|
---|
844 | # Split autoconf.h into include/linux/config/*
|
---|
845 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h
|
---|
846 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
|
---|
847 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/*
|
---|
848 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config
|
---|
849 | #bbox# piggybacked generation of few .h files
|
---|
850 | include/config/MARKER: scripts/basic/split-include include/autoconf.h
|
---|
851 | $(call cmd,split_autoconf)
|
---|
852 | $(call cmd,gen_bbconfigopts)
|
---|
853 | @touch $@
|
---|
854 |
|
---|
855 | # Generate some files
|
---|
856 | # ---------------------------------------------------------------------------
|
---|
857 |
|
---|
858 | # KERNELRELEASE can change from a few different places, meaning version.h
|
---|
859 | # needs to be updated, so this check is forced on all builds
|
---|
860 |
|
---|
861 | uts_len := 64
|
---|
862 |
|
---|
863 | define filechk_version.h
|
---|
864 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
|
---|
865 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
|
---|
866 | exit 1; \
|
---|
867 | fi; \
|
---|
868 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
|
---|
869 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
|
---|
870 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
|
---|
871 | )
|
---|
872 | endef
|
---|
873 |
|
---|
874 | # ---------------------------------------------------------------------------
|
---|
875 |
|
---|
876 | PHONY += depend dep
|
---|
877 | depend dep:
|
---|
878 | @echo '*** Warning: make $@ is unnecessary now.'
|
---|
879 |
|
---|
880 | # ---------------------------------------------------------------------------
|
---|
881 | # Modules
|
---|
882 |
|
---|
883 | ifdef _BB_DISABLED_CONFIG_MODULES
|
---|
884 |
|
---|
885 | # By default, build modules as well
|
---|
886 |
|
---|
887 | all: modules
|
---|
888 |
|
---|
889 | # Build modules
|
---|
890 |
|
---|
891 | PHONY += modules
|
---|
892 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
|
---|
893 | @echo ' Building modules, stage 2.';
|
---|
894 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
895 |
|
---|
896 |
|
---|
897 | # Target to prepare building external modules
|
---|
898 | PHONY += modules_prepare
|
---|
899 | modules_prepare: prepare scripts
|
---|
900 |
|
---|
901 | # Target to install modules
|
---|
902 | PHONY += modules_install
|
---|
903 | modules_install: _modinst_ _modinst_post
|
---|
904 |
|
---|
905 | PHONY += _modinst_
|
---|
906 | _modinst_:
|
---|
907 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
|
---|
908 | echo "Warning: you may need to install module-init-tools"; \
|
---|
909 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
|
---|
910 | sleep 1; \
|
---|
911 | fi
|
---|
912 | @rm -rf $(MODLIB)/kernel
|
---|
913 | @rm -f $(MODLIB)/source
|
---|
914 | @mkdir -p $(MODLIB)/kernel
|
---|
915 | @ln -s $(srctree) $(MODLIB)/source
|
---|
916 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
|
---|
917 | rm -f $(MODLIB)/build ; \
|
---|
918 | ln -s $(objtree) $(MODLIB)/build ; \
|
---|
919 | fi
|
---|
920 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
---|
921 |
|
---|
922 | # If System.map exists, run depmod. This deliberately does not have a
|
---|
923 | # dependency on System.map since that would run the dependency tree on
|
---|
924 | # busybox. This depmod is only for convenience to give the initial
|
---|
925 | # boot a modules.dep even before / is mounted read-write. However the
|
---|
926 | # boot script depmod is the master version.
|
---|
927 | ifeq "$(strip $(INSTALL_MOD_PATH))" ""
|
---|
928 | depmod_opts :=
|
---|
929 | else
|
---|
930 | depmod_opts := -b $(INSTALL_MOD_PATH) -r
|
---|
931 | endif
|
---|
932 | PHONY += _modinst_post
|
---|
933 | _modinst_post: _modinst_
|
---|
934 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
|
---|
935 |
|
---|
936 | else # CONFIG_MODULES
|
---|
937 |
|
---|
938 | # Modules not configured
|
---|
939 | # ---------------------------------------------------------------------------
|
---|
940 |
|
---|
941 | modules modules_install: FORCE
|
---|
942 | @echo
|
---|
943 | @echo "The present busybox configuration has modules disabled."
|
---|
944 | @echo "Type 'make config' and enable loadable module support."
|
---|
945 | @echo "Then build a kernel with module support enabled."
|
---|
946 | @echo
|
---|
947 | @exit 1
|
---|
948 |
|
---|
949 | endif # CONFIG_MODULES
|
---|
950 |
|
---|
951 | ###
|
---|
952 | # Cleaning is done on three levels.
|
---|
953 | # make clean Delete most generated files
|
---|
954 | # Leave enough to build external modules
|
---|
955 | # make mrproper Delete the current configuration, and all generated files
|
---|
956 | # make distclean Remove editor backup files, patch leftover files and the like
|
---|
957 |
|
---|
958 | # Directories & files removed with 'make clean'
|
---|
959 | CLEAN_DIRS += $(MODVERDIR) _install 0_lib
|
---|
960 | CLEAN_FILES += busybox busybox_unstripped* busybox.links \
|
---|
961 | System.map .kernelrelease \
|
---|
962 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
|
---|
963 |
|
---|
964 | # Directories & files removed with 'make mrproper'
|
---|
965 | MRPROPER_DIRS += include/config include2
|
---|
966 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \
|
---|
967 | include/NUM_APPLETS.h \
|
---|
968 | include/autoconf.h \
|
---|
969 | include/bbconfigopts.h \
|
---|
970 | include/bbconfigopts_bz2.h \
|
---|
971 | include/usage_compressed.h \
|
---|
972 | include/applet_tables.h \
|
---|
973 | include/applets.h \
|
---|
974 | include/usage.h \
|
---|
975 | applets/usage \
|
---|
976 | .kernelrelease Module.symvers tags TAGS cscope* \
|
---|
977 | busybox_old
|
---|
978 |
|
---|
979 | # clean - Delete most, but leave enough to build external modules
|
---|
980 | #
|
---|
981 | clean: rm-dirs := $(CLEAN_DIRS)
|
---|
982 | clean: rm-files := $(CLEAN_FILES)
|
---|
983 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
|
---|
984 |
|
---|
985 | PHONY += $(clean-dirs) clean archclean
|
---|
986 | $(clean-dirs):
|
---|
987 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
---|
988 |
|
---|
989 | clean: archclean $(clean-dirs)
|
---|
990 | $(call cmd,rmdirs)
|
---|
991 | $(call cmd,rmfiles)
|
---|
992 | @find . $(RCS_FIND_IGNORE) \
|
---|
993 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
---|
994 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
---|
995 | -type f -print | xargs rm -f
|
---|
996 |
|
---|
997 | PHONY += doc-clean
|
---|
998 | doc-clean: rm-files := docs/busybox.pod \
|
---|
999 | docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
|
---|
1000 | doc-clean:
|
---|
1001 | $(call cmd,rmfiles)
|
---|
1002 |
|
---|
1003 | # mrproper - Delete all generated files, including .config
|
---|
1004 | #
|
---|
1005 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
|
---|
1006 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
|
---|
1007 | mrproper-dirs := $(addprefix _mrproper_,scripts)
|
---|
1008 |
|
---|
1009 | PHONY += $(mrproper-dirs) mrproper archmrproper
|
---|
1010 | $(mrproper-dirs):
|
---|
1011 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
|
---|
1012 |
|
---|
1013 | mrproper: clean archmrproper $(mrproper-dirs)
|
---|
1014 | $(call cmd,rmdirs)
|
---|
1015 | $(call cmd,rmfiles)
|
---|
1016 | @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
|
---|
1017 | @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
|
---|
1018 |
|
---|
1019 | # distclean
|
---|
1020 | #
|
---|
1021 | PHONY += distclean
|
---|
1022 |
|
---|
1023 | distclean: mrproper
|
---|
1024 | @find $(srctree) $(RCS_FIND_IGNORE) \
|
---|
1025 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
|
---|
1026 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
|
---|
1027 | -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
|
---|
1028 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
|
---|
1029 | -type f -print | xargs rm -f
|
---|
1030 |
|
---|
1031 |
|
---|
1032 | # Packaging of the kernel to various formats
|
---|
1033 | # ---------------------------------------------------------------------------
|
---|
1034 | # rpm target kept for backward compatibility
|
---|
1035 | package-dir := $(srctree)/scripts/package
|
---|
1036 |
|
---|
1037 | %pkg: FORCE
|
---|
1038 | $(Q)$(MAKE) $(build)=$(package-dir) $@
|
---|
1039 | rpm: FORCE
|
---|
1040 | $(Q)$(MAKE) $(build)=$(package-dir) $@
|
---|
1041 |
|
---|
1042 |
|
---|
1043 | # Brief documentation of the typical targets used
|
---|
1044 | # ---------------------------------------------------------------------------
|
---|
1045 |
|
---|
1046 | boards := $(wildcard $(srctree)/configs/*_defconfig)
|
---|
1047 | boards := $(notdir $(boards))
|
---|
1048 |
|
---|
1049 | -include $(srctree)/Makefile.help
|
---|
1050 |
|
---|
1051 | # Documentation targets
|
---|
1052 | # ---------------------------------------------------------------------------
|
---|
1053 | %docs: scripts_basic FORCE
|
---|
1054 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@
|
---|
1055 |
|
---|
1056 | else # KBUILD_EXTMOD
|
---|
1057 |
|
---|
1058 | ###
|
---|
1059 | # External module support.
|
---|
1060 | # When building external modules the kernel used as basis is considered
|
---|
1061 | # read-only, and no consistency checks are made and the make
|
---|
1062 | # system is not used on the basis kernel. If updates are required
|
---|
1063 | # in the basis kernel ordinary make commands (without M=...) must
|
---|
1064 | # be used.
|
---|
1065 | #
|
---|
1066 | # The following are the only valid targets when building external
|
---|
1067 | # modules.
|
---|
1068 | # make M=dir clean Delete all automatically generated files
|
---|
1069 | # make M=dir modules Make all modules in specified dir
|
---|
1070 | # make M=dir Same as 'make M=dir modules'
|
---|
1071 | # make M=dir modules_install
|
---|
1072 | # Install the modules build in the module directory
|
---|
1073 | # Assumes install directory is already created
|
---|
1074 |
|
---|
1075 | # We are always building modules
|
---|
1076 | KBUILD_MODULES := 1
|
---|
1077 | PHONY += crmodverdir
|
---|
1078 | crmodverdir:
|
---|
1079 | $(Q)mkdir -p $(MODVERDIR)
|
---|
1080 | $(Q)rm -f $(MODVERDIR)/*
|
---|
1081 |
|
---|
1082 | PHONY += $(objtree)/Module.symvers
|
---|
1083 | $(objtree)/Module.symvers:
|
---|
1084 | @test -e $(objtree)/Module.symvers || ( \
|
---|
1085 | echo; \
|
---|
1086 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
|
---|
1087 | echo " is missing; modules will have no dependencies and modversions."; \
|
---|
1088 | echo )
|
---|
1089 |
|
---|
1090 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
|
---|
1091 | PHONY += $(module-dirs) modules
|
---|
1092 | $(module-dirs): crmodverdir $(objtree)/Module.symvers
|
---|
1093 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
|
---|
1094 |
|
---|
1095 | modules: $(module-dirs)
|
---|
1096 | @echo ' Building modules, stage 2.';
|
---|
1097 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
1098 |
|
---|
1099 | PHONY += modules_install
|
---|
1100 | modules_install: _emodinst_ _emodinst_post
|
---|
1101 |
|
---|
1102 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
|
---|
1103 | PHONY += _emodinst_
|
---|
1104 | _emodinst_:
|
---|
1105 | $(Q)mkdir -p $(MODLIB)/$(install-dir)
|
---|
1106 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
---|
1107 |
|
---|
1108 | # Run depmod only is we have System.map and depmod is executable
|
---|
1109 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
|
---|
1110 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
|
---|
1111 | $(DEPMOD) -ae -F System.map \
|
---|
1112 | $(if $(strip $(INSTALL_MOD_PATH)), \
|
---|
1113 | -b $(INSTALL_MOD_PATH) -r) \
|
---|
1114 | $(KERNELRELEASE); \
|
---|
1115 | fi
|
---|
1116 |
|
---|
1117 | PHONY += _emodinst_post
|
---|
1118 | _emodinst_post: _emodinst_
|
---|
1119 | $(call cmd,depmod)
|
---|
1120 |
|
---|
1121 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
|
---|
1122 |
|
---|
1123 | PHONY += $(clean-dirs) clean
|
---|
1124 | $(clean-dirs):
|
---|
1125 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
---|
1126 |
|
---|
1127 | clean: rm-dirs := $(MODVERDIR)
|
---|
1128 | clean: $(clean-dirs)
|
---|
1129 | $(call cmd,rmdirs)
|
---|
1130 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
|
---|
1131 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
---|
1132 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
---|
1133 | -type f -print | xargs rm -f
|
---|
1134 |
|
---|
1135 | # Dummies...
|
---|
1136 | PHONY += prepare scripts
|
---|
1137 | prepare: ;
|
---|
1138 | scripts: ;
|
---|
1139 | endif # KBUILD_EXTMOD
|
---|
1140 |
|
---|
1141 | # Generate tags for editors
|
---|
1142 | # ---------------------------------------------------------------------------
|
---|
1143 |
|
---|
1144 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
|
---|
1145 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
|
---|
1146 | #Adding $(srctree) adds about 20M on i386 to the size of the output file!
|
---|
1147 |
|
---|
1148 | ifeq ($(src),$(obj))
|
---|
1149 | __srctree =
|
---|
1150 | else
|
---|
1151 | __srctree = $(srctree)/
|
---|
1152 | endif
|
---|
1153 |
|
---|
1154 | ifeq ($(ALLSOURCE_ARCHS),)
|
---|
1155 | ifeq ($(ARCH),um)
|
---|
1156 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
|
---|
1157 | else
|
---|
1158 | ALLINCLUDE_ARCHS := $(ARCH)
|
---|
1159 | endif
|
---|
1160 | else
|
---|
1161 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
|
---|
1162 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
|
---|
1163 | endif
|
---|
1164 |
|
---|
1165 | ALLSOURCE_ARCHS := $(ARCH)
|
---|
1166 |
|
---|
1167 | define all-sources
|
---|
1168 | ( find $(__srctree) $(RCS_FIND_IGNORE) \
|
---|
1169 | \( -name include -o -name arch \) -prune -o \
|
---|
1170 | -name '*.[chS]' -print; \
|
---|
1171 | for ARCH in $(ALLSOURCE_ARCHS) ; do \
|
---|
1172 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
|
---|
1173 | -name '*.[chS]' -print; \
|
---|
1174 | done ; \
|
---|
1175 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
|
---|
1176 | -name '*.[chS]' -print; \
|
---|
1177 | find $(__srctree)include $(RCS_FIND_IGNORE) \
|
---|
1178 | \( -name config -o -name 'asm-*' \) -prune \
|
---|
1179 | -o -name '*.[chS]' -print; \
|
---|
1180 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \
|
---|
1181 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
|
---|
1182 | -name '*.[chS]' -print; \
|
---|
1183 | done ; \
|
---|
1184 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
|
---|
1185 | -name '*.[chS]' -print )
|
---|
1186 | endef
|
---|
1187 |
|
---|
1188 | quiet_cmd_cscope-file = FILELST cscope.files
|
---|
1189 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
|
---|
1190 |
|
---|
1191 | quiet_cmd_cscope = MAKE cscope.out
|
---|
1192 | cmd_cscope = cscope -b
|
---|
1193 |
|
---|
1194 | cscope: FORCE
|
---|
1195 | $(call cmd,cscope-file)
|
---|
1196 | $(call cmd,cscope)
|
---|
1197 |
|
---|
1198 | quiet_cmd_TAGS = MAKE $@
|
---|
1199 | define cmd_TAGS
|
---|
1200 | rm -f $@; \
|
---|
1201 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
|
---|
1202 | echo "-I __initdata,__exitdata,__acquires,__releases \
|
---|
1203 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
|
---|
1204 | --extra=+f --c-kinds=+px"`; \
|
---|
1205 | $(all-sources) | xargs etags $$ETAGSF -a
|
---|
1206 | endef
|
---|
1207 |
|
---|
1208 | TAGS: FORCE
|
---|
1209 | $(call cmd,TAGS)
|
---|
1210 |
|
---|
1211 |
|
---|
1212 | quiet_cmd_tags = MAKE $@
|
---|
1213 | define cmd_tags
|
---|
1214 | rm -f $@; \
|
---|
1215 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
|
---|
1216 | echo "-I __initdata,__exitdata,__acquires,__releases \
|
---|
1217 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
|
---|
1218 | --extra=+f --c-kinds=+px"`; \
|
---|
1219 | $(all-sources) | xargs ctags $$CTAGSF -a
|
---|
1220 | endef
|
---|
1221 |
|
---|
1222 | tags: FORCE
|
---|
1223 | $(call cmd,tags)
|
---|
1224 |
|
---|
1225 |
|
---|
1226 | # Scripts to check various things for consistency
|
---|
1227 | # ---------------------------------------------------------------------------
|
---|
1228 |
|
---|
1229 | includecheck:
|
---|
1230 | find * $(RCS_FIND_IGNORE) \
|
---|
1231 | -name '*.[hcS]' -type f -print | sort \
|
---|
1232 | | xargs $(PERL) -w scripts/checkincludes.pl
|
---|
1233 |
|
---|
1234 | versioncheck:
|
---|
1235 | find * $(RCS_FIND_IGNORE) \
|
---|
1236 | -name '*.[hcS]' -type f -print | sort \
|
---|
1237 | | xargs $(PERL) -w scripts/checkversion.pl
|
---|
1238 |
|
---|
1239 | namespacecheck:
|
---|
1240 | $(PERL) $(srctree)/scripts/namespace.pl
|
---|
1241 |
|
---|
1242 | endif #ifeq ($(config-targets),1)
|
---|
1243 | endif #ifeq ($(mixed-targets),1)
|
---|
1244 |
|
---|
1245 | PHONY += checkstack
|
---|
1246 | checkstack:
|
---|
1247 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
|
---|
1248 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
|
---|
1249 |
|
---|
1250 | kernelrelease:
|
---|
1251 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
|
---|
1252 | $(error kernelrelease not valid - run 'make *config' to update it))
|
---|
1253 | kernelversion:
|
---|
1254 | @echo $(KERNELVERSION)
|
---|
1255 |
|
---|
1256 | # Single targets
|
---|
1257 | # ---------------------------------------------------------------------------
|
---|
1258 | # Single targets are compatible with:
|
---|
1259 | # - build whith mixed source and output
|
---|
1260 | # - build with separate output dir 'make O=...'
|
---|
1261 | # - external modules
|
---|
1262 | #
|
---|
1263 | # target-dir => where to store outputfile
|
---|
1264 | # build-dir => directory in kernel source tree to use
|
---|
1265 |
|
---|
1266 | ifeq ($(KBUILD_EXTMOD),)
|
---|
1267 | build-dir = $(patsubst %/,%,$(dir $@))
|
---|
1268 | target-dir = $(dir $@)
|
---|
1269 | else
|
---|
1270 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
|
---|
1271 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
|
---|
1272 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
|
---|
1273 | endif
|
---|
1274 |
|
---|
1275 | %.s: %.c prepare scripts FORCE
|
---|
1276 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1277 | %.i: %.c prepare scripts FORCE
|
---|
1278 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1279 | %.o: %.c prepare scripts FORCE
|
---|
1280 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1281 | %.lst: %.c prepare scripts FORCE
|
---|
1282 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1283 | %.s: %.S prepare scripts FORCE
|
---|
1284 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1285 | %.o: %.S prepare scripts FORCE
|
---|
1286 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
1287 |
|
---|
1288 | # Modules
|
---|
1289 | %/: prepare scripts FORCE
|
---|
1290 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
1291 | $(build)=$(build-dir)
|
---|
1292 | /: prepare scripts FORCE
|
---|
1293 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
1294 | $(build)=$(build-dir)
|
---|
1295 |
|
---|
1296 | %.ko: prepare scripts FORCE
|
---|
1297 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
1298 | $(build)=$(build-dir) $(@:.ko=.o)
|
---|
1299 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
1300 |
|
---|
1301 | # FIXME Should go into a make.lib or something
|
---|
1302 | # ===========================================================================
|
---|
1303 |
|
---|
1304 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
|
---|
1305 | cmd_rmdirs = rm -rf $(rm-dirs)
|
---|
1306 |
|
---|
1307 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
|
---|
1308 | cmd_rmfiles = rm -f $(rm-files)
|
---|
1309 |
|
---|
1310 |
|
---|
1311 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
|
---|
1312 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \
|
---|
1313 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
|
---|
1314 |
|
---|
1315 | quiet_cmd_as_o_S = AS $@
|
---|
1316 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
|
---|
1317 |
|
---|
1318 | # read all saved command lines
|
---|
1319 |
|
---|
1320 | targets := $(wildcard $(sort $(targets)))
|
---|
1321 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
|
---|
1322 |
|
---|
1323 | ifneq ($(cmd_files),)
|
---|
1324 | $(cmd_files): ; # Do not try to update included dependency files
|
---|
1325 | include $(cmd_files)
|
---|
1326 | endif
|
---|
1327 |
|
---|
1328 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
|
---|
1329 | # Usage:
|
---|
1330 | # $(Q)$(MAKE) $(clean)=dir
|
---|
1331 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
|
---|
1332 |
|
---|
1333 | endif # skip-makefile
|
---|
1334 |
|
---|
1335 | PHONY += FORCE
|
---|
1336 | FORCE:
|
---|
1337 |
|
---|
1338 | -include $(srctree)/Makefile.custom
|
---|
1339 |
|
---|
1340 | # Declare the contents of the .PHONY variable as phony. We keep that
|
---|
1341 | # information in a variable se we can use it in if_changed and friends.
|
---|
1342 | .PHONY: $(PHONY)
|
---|